InChI=1S/C19H18N2O4/c22-14-7-5-12(6-8-14)9-17(19(24)25)21-18(23)10-13-11-20-16-4-2-1-3-15(13)16/h1-8,11,17,20,22H,9-10H2,(H,21,23)(H,24,25)/p-1